Question

If a = 3, b =1 and c = 2, find the value of a2 + b2+ c2 + 2ab +2bc +ca.​

Answer 1

Answer:

28

Step-by-step explanation:

(3×2) + (1×2) + (2×2) + (2×3×1) + (2×1×2) + (2×3)

6 + 2 + 4 + 6 + 4 + 6

28

Answer 2

Answer:

for a= 3,b= 1 and c= 2, a^2+b^2+c^2+2ab+2bc+2ca

= 3^2 + 1^2 + 2^2 + 12+ 4+ 12

= 9+1+4+26

= 40,the required answer